What can cause two OSPF neighbors to be stuck in the EXSTART state?

A snack retailer runs an eight-week video campaign with attributed sales. The campaign targets snack lovers, gamers, and millennials. The test results are as follows:

What should the company test using experimental design to improve efficiency in number of exposures?

A marketing analyst wants to understand the relationship between campaign frequency and additional return on ad spend (ROAS) across 150 CPG Facebook campaigns. The analyst has the following information on these campaigns: reach, frequency, duration, budget, product category, buying strategies, and outcomes like additional sales and ROAS. The analyst suspects that campaign frequency is related to other campaign characteristics and is planning to run the following statistical model:
ROAS Lift = bO + b1.reach + b2.frequency + b3.duration + b4.budget + b5.product category + b6.buying strategy
What two additional statistical analysis are required to test the analyst's hypothesis? (Choose 2)

Which of these represents an IPv6 link-local address?

Refer to the exhibit.

Given the output from the show ip eigrp topology command, which router is the feasible successor?
A)


B)
C)

D)